title: Effects of selenium supplemented diets on growth and condition indexes in juvenile red swamp crayfish, Procambarus clarkii.
abstract: Effects of selenium diets (Se, 0.3 and 1.2mgkg(-1)) on juvenile red swamp crayfish Procambarus clarkii were observed for eight weeks. Growth, condition factors and Se levels in exoskeleton and hepatopancreas for both sexes and diets were evaluated at three endpoints. The specific growth rate (SGR) showed a faster, but not statistically significant growth in Se exposed specimens. Se levels were higher in exoskeleton and hepatopancreas of both Se exposed males and females, when compared to controls. The abdomen-total weight relationship (Tw/B) showed no significant differences between Se exposed and control groups. A constant decline of HI values was recorded in both Se exposed sexes and the same trend was observed in control males. Se exposed females evidenced lower HI after 4 and 8 weeks when compared to controls. Therefore, evident reductions of the health indicator values HI suggested that selenium can deplete the hepatopancreas energy reserves, mainly in juvenile male crayfish.
authors.affiliation: Department of Cellular and Environmental Biology, University of Perugia, 06123 Perugia, Italy.
authors.forename: Ambrosius Josef Martin
authors.initials: AJM
authors.lastname: Dörr
authors.affiliation: C.Re.A.A. National Reference Centre for the Surveillance and Monitoring of Animal Feed, State Veterinary Institute, 10154 Torino, Italy.
authors.forename: Maria Cesarina
authors.initials: MC
authors.lastname: Abete
authors.affiliation: Fish Pathology and Aquaculture, State Veterinary Institute, 10154 Torino, Italy.
authors.forename: Marino
authors.initials: M
authors.lastname: Prearo
authors.affiliation: Department of Cellular and Environmental Biology, University of Perugia, 06123 Perugia, Italy.
authors.forename: Nicole
authors.initials: N
authors.lastname: Pacini
authors.affiliation: Department of Cellular and Environmental Biology, University of Perugia, 06123 Perugia, Italy.
authors.forename: Gianandrea
authors.initials: G
authors.lastname: La Porta
authors.affiliation: Fish Breeding Centre of Lake Trasimeno, Province of Perugia, 06123 Perugia, Italy.
authors.forename: Mauro
authors.initials: M
authors.lastname: Natali
authors.affiliation: Department of Cellular and Environmental Biology, University of Perugia, 06123 Perugia, Italy. Electronic address: elia@unipg.it.
authors.forename: Antonia Concetta
authors.initials: AC
authors.lastname: Elia
mesh_terms: D000367:Age Factors; D000821:Animal Feed; D000818:Animals; D003400:Astacoidea / Q000187:drug effects* / Q000254:growth & development* / Q000378:metabolism; D004032:Diet; D019587:Dietary Supplements; D004734:Energy Metabolism; D005260:Female; D043143:Hepatopancreas / Q000187:drug effects / Q000378:metabolism; D006801:Humans; D008297:Male; D012643:Selenium / Q000008:administration & dosage* / Q000378:metabolism; D012737:Sex Factors; D013997:Time Factors; D015430:Weight Gain / Q000187:drug effects
chemical_list: D012643:Selenium
keywords: Condition factor; Growth; Hepatopancreas; Procambarus clarkii; Selenium